Bouncing universes with varying constants

被引:95
作者
Barrow, JD
Kimberly, D
Magueijo, J
机构
[1] Univ Cambridge, Ctr Math Sci, DAMTP, Cambridge CB3 0WA, England
[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England
关键词
D O I
10.1088/0264-9381/21/18/001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the behaviour of exact closed bouncing Friedmann universes in theories with varying constants. We show that the simplest BSBM varying alpha theory leads to a bouncing universe. The value of alpha increases monotonically, remaining approximately constant during most of each cycle, but increasing significantly around each bounce. When dissipation is introduced we show that in each new cycle the universe expands for longer and to a larger size. We find a similar effect for closed bouncing universes in Brans-Dicke theory, where G also varies monotonically in time from cycle to cycle. Similar behaviour occurs also in varying speed of light theories.
引用
收藏
页码:4289 / 4296
页数:8
相关论文
共 38 条
[1]   Time varying speed of light as a solution to cosmological puzzles [J].
Albrecht, A ;
Magueijo, J .
PHYSICAL REVIEW D, 1999, 59 (04)
[2]  
Armendariz-Picon C, 2001, PHYS REV D, V63, DOI 10.1103/PhysRevD.63.103510
[3]  
Barrow J.D., 1986, ANTHROPIC COSMOLOGIC
[4]   SCALAR-TENSOR COSMOLOGIES [J].
BARROW, JD .
PHYSICAL REVIEW D, 1993, 47 (12) :5329-5335
[5]   On the stability of the Einstein static universe [J].
Barrow, JD ;
Ellis, GFR ;
Maartens, R ;
Tsagas, CG .
CLASSICAL AND QUANTUM GRAVITY, 2003, 20 (11) :L155-L164
[6]   Qualitative analysis of universes with varying alpha [J].
Barrow, JD ;
Mota, DF .
CLASSICAL AND QUANTUM GRAVITY, 2002, 19 (23) :6197-6212
[7]   SIZE OF A BOUNCING MIXMASTER UNIVERSE [J].
BARROW, JD ;
MATZNER, RA .
PHYSICAL REVIEW D, 1980, 21 (02) :336-340
[8]   OSCILLATING UNIVERSES [J].
BARROW, JD ;
DABROWSKI, MP .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 275 (03) :850-862
[9]  
BARROW JD, 1999, PHYS REV D
[10]   FINE-STRUCTURE CONSTANT - IS IT REALLY A CONSTANT [J].
BEKENSTEIN, JD .
PHYSICAL REVIEW D, 1982, 25 (06) :1527-1539